Is there a way to remove the Protected Content of a .wma file?

I did a major booboo, I burned alot of cd's to .wma files in windows 9 and forgot to uncheck the "protect copy" in preferences in windows media player and all the .wma files that I want to transfer to an mp3 player won't play because of the Copy to a SDMI-complaint portable player not allowed is active.
Is there a way to remove this license from the file?